inventory vs inventory item

inventory and inventory item both are nouns.

Word	Noun	Adjective	Verb	Adverb
inventory	Yes	No	Yes	No
inventory item	Yes	No	No	No

inventory (noun)	inventory item (noun)
making an itemized list of merchandise or supplies on hand	an item listed in an inventory
the merchandise that a shop has on hand
a collection of resources
a detailed list of all the items in stock
(accounting) the value of a firm's current assets including raw materials and work in progress and finished goods

inventory (verb)	inventory item (verb)
make or include in an itemized record or report